Multiple tapping device



2 Sheets-Sheet l G. EMRICK MULTIPLE APPING DEVICE Filed June 18, 1954 ZY!J j li /a W HST April 16, 1935.

INVENToR GEORGE /4/. {MR/ck ATTQRNE April 16, 1935. G, W, EMRICK 1,998,275

MULTIPLE TAPPING DEVICE Filed June 18, 1954` L 2 sheets-sheet 2 ATTORNE `Patented Apr. 1 6, 12935 UNITED STATES? PATENT OFFICE l MUL'rrPLE TAPPING DEVICE George W. Emrick, Brooklyn, N. Y. Application .time 1s, 1934, serial No. 731,091

' 18 claims. (o1. 141-129)V This invention relates to multiple tapping del vices and particularly to devices of this class employing means whereby various 'sizes' and arrangements of gear cases may be used in con- 5 junction with a single attachment; and the object of the invention is to provide a tapping attachment with a coupling plate of standard'size and wherein gear cases of diferent sizes and arrangementsl may be coupled therewith `so' that a single tapping attachment may be adapted to many uses in multiple tapping work; Va further object being to provide yieldable means for supporting the gear case and couplingV plate in connectionl with the attachment; ya further object being to provideV means for coupling guide Vblocks in connection with the gear case including work locating or alinement rods; a stillfurther object being to provide means for adapting the gear cases as multiple drilling attachments to provide two distinct u sss thereof; a still further object being to provide a complete unit Aattachment of the classdescribed wherein the several parts are interchangeablein the construction of the gear cases, whereby in laying out a case 'of specific design, gears, spindles and the like of stock sizes may be employed in constructing or assembling the case, thus materially reducing the production cost thereof, and inA all cases, the tapping attachment, which by the way. may be made in three or more sizes, will in so far as" each'size is concerned be usable in conjunction with numerous arrangements .of .gear cases, thus eliminating the necessity of purchasingV or constructing separate tappingV attachments as has been the practiceheretoiore; and with Athese and other objects in view, the invention consists in a device of the class and vfor the purpose specified which is simple in constructiony eilicient in use and which is constructed as hereinafter described and claimed.

The invention is fully disclosed in the following specication, of which the accompanying drawings orm a part, in which the separate'parts oi my improvement are designated'by suitable reference characters in leach Vof the views, andV in which:

part of the construction brok section,

en Y away and in 'projecting hexagon or angular shank I3 through vingrodsZI-i. The crosshead ofthe yoke- 2l is re- `yoke having an upwardly directed -lug 2Ibgin Fig. 3 is a plan view of the structure shown in Fig. 2. j j,

Fig. 4 is a partial section on `the line 4 4 of Fig. 1.

Fig. 5 is a view similar to Fig. 1 showing the 4v, 5 parts in separated position and showing a mod'- ilication. Y Y

Fig. 6 is a sideand sectional view showing a gear case or hood applied to the modiiied use;

and,

Fig. 7 is 1a partial section on the line 'I-I of Fig. 2.; Y.

Y In the drawings I0 represents the casing of a tapping attachment, the driveV mechanism of which forms the subjectr matter of a priorY application filed by me May 17, 1934 and bearing Serial Number 726,107, which mechanism involves a tapered shank I I actuating a drive gear'l2 disposedwithin the casing for 'directly driving a 20 a suitable friction drive I4 or to operate theshank I3 in a reverse direction rthrough a reverse drive gear chain indicated at I5. The drive mechanism of the casing Il)y operates in aA bath of oil which is introduced into the casing through a suitable oil admission plug `I6 lso as to adapt the attachment to high speedwork. y L

The casing shown Vin my prior application is modiiied to the end of providing a relatively ilat plate'portion I'I thereon to provide forthe attachment of a guide bracket or other-supporting member I8, the bracket I3 having a pair of cyylindrical bearings Ia for receiving guide rods I9 as clearlyV seen in Figs. 2 and 3 of the drawings.

The opposed side wall of the casing has an outwardly projecting lug 2D in connection with which is pivoted an adjustment and supporting yoke 2 I, the free ends of the side arms 22 of which arey adapted to enter recesses in supportingV and. guidcessed asv seen at Zla. to receive the `projecting lug 20, and a pin 26a extends through the-lug and the crosshead to, pivotally support the yoke in connection Withthe casing, the crosshead of said which is mounted a spring adjustment screw 24 'operating upon a spring 25 to balance or-yieldably support a coupling plate 26 as well as a gear case or head 21 including the parts thereof or coupled therewith in connection with the casing Ill. AThe 5o casing Ill,V also has lprojecting side lugs Ita through which the supporting and guide rods 23 P21455.k n The coupling plate 26 becomes a standard nxture of themtapping attachment, the gear cases or 5,5.

heads 2l regardless oi their diiference in design, size or contour being all made to fit the standard plate, at least in the several sizes of attachments employed, it being understood at this time that the tapping attachment involving the casing it and/or parts thereof may be made in three or more sizes adapting the same to light, heavy or extremely heavy work. 'I'he bars 23 enter apertures in the plate 26 and after adjusting the plate to a desired position and alinement with. respect to the casing, the bars are definitely secured to the plate by pins or other means 28.

Arranged centrally of the plate 26 is a ball bearing 29, the outer race of which is held in place by a lock screw 3d. Arranged within the inner race of the ball bearing is a drive sleeve 3i held in place by a nut 32, the bore of the sleeve 3l being hexagon or angular in form to receive the angular drive spindle i3 as well as the projecting angular portion or" the driven spindle 33 of the gear case 2li. The lower surface of the coupling plate 26 seats in a recess 27a formed in the upper part of the case and the plate 2B is pro vided with a plurality of circumferentially elongated apertures 25a, note Fig. '7, through which bolts 25h are passed to adjustably couple the gear case 2'! with respect to the plate so asrto properly aline or position the tapping tools 34 with respect tothe workpiece, as will be apparent.

The gear case or head 2l consists of a casing proper 35 and a cover plate 35 secured thereto by bolts or screws 31. The shaft or spindle 33 is mounted in suitable bushings 38 in the casing 35, and 38a in the cover 35. Keyed to the spindle is a drive gear Se adapted to mesh with idler gears 40, which in turn mesh with gears 4 l on the different driven spindlesV/iZ, any number of which may be employed, and'two of which are shown in the-accompanying drawings. The free ends of the spindles 42 project below the lower surface of themcasing 35 and are tapered to receive chuck casings 43 having a drive iit thereon, the chuck casing having means indicated at 44 for securing the taps 34 in connection therewith. My invention is not limited to any particular type or kind of chuck employed as any conventional type of chuck may be employed for this purpose.

Each of' the driven spindles l2 is mounted in bushings 45 in the casing 35 and cover 3G and bearing washersor disks 46 are pressed vinto the inner surfaces of said bushings and operate upon similar washers or rings il disposedr adjacent the groove il and keyed to the spindles by the flattened surfaces provided on said spindles as indicated at 42a in Fig. 4 of ie draufings. Secured centrally to the lower portion of the casing 35 is an adjustable depth 'stope guide or Workpiece locator 48 operating in conjunction with'v a plate or guide 49 secured to the base or xture 56 in conjuction with which the workpiece indicated at 5| is supported.

I also may employ workpiece supporting or locating rods a such as indicated in dot and dash lines in Fig. l of the drawings tol aid in locating' or centering tive workpiece 5I with respect to the taps 3s, which rodsV 55a will besupported in connection with the gear case or head 21' in the manner of supporting guideblocks 52 thereon, the latter having two cylindrical bearings 52a for receiving the guide rods i9 in order to guide the case 2 in conjunction with the at'- tachment casing i8 in the upward and Vdownward movement of the complete unit in performing tapping operations.

Y The block 52 has an'arc-shaped `portion 52h seating in an annular groove or recess 53 formed on the outer surface of the gear case 2 and bctween a lower outwardly flanged portion of the casing 35 thereof and the cover b35.

At this time it will be understood that the position of the driven spindles 42 radially and cirournferentially with respect to the drive spindle 33 of the gear case 2l will Varyrin many instances, and it is proposed that stock sizes of gears or pinions` will be employed so as to readily construct gear cases to suit various types of work, the only requirement being to construct a special casing 35 and cover plate 36 therefor in conlid which are incorporated. In this way, a large variety ofgear cases or heads may be used in conjunction with a single tapping attachment, each case or head having a recess Ela to fit the standard or xed size of coupling plate 25employed.

In order to illustrate one modified use of the invention, l have indicated in Fig. 5 of the drawings, .a gear case or head 54 which is larger in diameter than thercase 27. Aside from the fact that the gears or pinions Vwill be of a larger size, the structure of the case 55 in so far as elements are concerned, is the same as the case 2 and like references will indicate like parts in the respective illustrations. Atthis time, it is also important to note that the drive spindles 33 of the gear cases or heads employed will have anguf lar shanks adapted to enterV theangular Vbores of thedrive sleeves 3i, which are clearly illustrated by the separation ofthe case 5# from the plate 2S in Fig5 ofthe drawings.

In Fig. 6 of the drawings, I have shown a modied use of my invention wherein a gear case or head 2 similar to the head 2l' shown in Fig. l of the drawings is attached to a standard adaptor plate or coupling 55 in which is rotatably mounted a tapereddrive shank 55 for attachment with a drill press or the like, the shank operating in a double roller bearing construction 51 in the plate 55and having an angular socket portion 58 for receiving the angular portion of the drive spindle 33 of the gear case. With this construction, the driven spindles 2 receive chucks 5e for coupling drills Gil therewith, and the plate 55 will have a projecting guide member 55a for engaging a guide rod or lrods Elon which the case 21 is also guided by the block 52 similar to that shown in Figs. 2 and 3 of the drawings;

From the foregoing it will appear` that in addition to using the gear cases or heads simply for the purpose of driving tapping tools, the saine may also be used to rst drill holes prior to the tapping thereof without any structural change in the gear case or head, but simply by providing suitable chucks on` the driven spindles 42 for coupling taps and drills therewith. It will thus be seen that in this use ofthe invention, coupling plates 55 of standard sizes corresponding to the sizes of the coupling plates 2E may be employed for the respective gear cases or heads employed to produce both multipleY drilling and tapping operations on respective workpieces.

In operation, it will be apparent that in the forward drive of the driven spindle i3 of the tapping attachment, the several taps 34 of the gear case or tapered head will be driven in Ya forward direction through the gears 3e, 4G and 4l employed therein, and in the reverse drive ofthe spindle I3, a corresponding reverse rotationV will Cil be imparted to the'taps 3lrLrIn both of these operations,

employed. In both of these operations, the

spring 25 which acts asa meansfor counterbalancing the weightof the gear case 21 and couplingr plate 2li,V will permit'independent movement of v'said vplate and vcase with respect to the casing IB of the tapping attachment should the tools be subjected tothe stress or strainiin theirdownward and upward movements. t y

The casing 35 is provided with a grease admission cup 62 whereby a light grease may beintroduced into the chamber of the gear case toY thor- `oughly lubricate the gears as well as the bearings provided therein and the spindles employed, so

as to facilitate the use of the multiple unit for high speed work l My improved multiple tapping device or unit,

by virtue of thestandardization of the majority ofthe parts thereof will provide a shop accustomed to producing various types of multiple-tap-` pings in workpieces With a simple and economical means-for carrying out such wide range and variations in work to be produced at a great savring in time and expense in equipment, thus enabling the shop to produce work of this type more economically by materially reducing the tool or -rlxture costs.

While limited-uses of the invention are herein illustrated, the same will be applicable to unlimited uses and various changes in and` modifications of the 'construction herein described may be made within the scope of the appended claims.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent, is: Y l f f Y y l. In multiple tappers of the class described, a tapping attachment'having a forward and reverse driven spindle projecting therefrom with' means for actuating'said spindle in forward and. reverse directions, and a A coupling [plate including a driven member keyed tol the driven spindle of said attachment and havingV a standard socket portion in connection with which a member to be driven' is adapted to be coupled independent of Y the driven spindle.

2. In multiple tappers of the class described, a tapping attachment having aforward and reverse driven spindle projectingV therefrom with means yfor actuating said spindle in forward and reverse directions, and a couplingplate including a driven member keyed to the driven spindle ofY said attachment and having a standard socket portion in connection with which members to be driven are adapted to be coupled, and means ,forv yieldably and adjustably supportingsaid plate in connection with the casing of said attachment.

3. The combination with a tapping attachment of theclass described having a vdriven member, of amultiple tool head having a drive member, and means including a coupling plate of standard size for coupling heads of varying characteristics Y with the tapping attachment, said couplingl plate including means for placingrthe driven member of the attachment in operative engagement'with the drive member of said head, and said means comprising a coupling sleeve rotatably mounted on the plate and having an angular socket for receiving angular ends of said drive and driven members. p y f 4. The combination with a tapping attachment `of theclass described having a driven member,

of a multiple tool 'head having a drive member, and means including a coupling plate of standard size for coupling heads of varying characteristics'with the tapping attachment, said coupling 4plate including means for placing the driven member of the attachment in operative engagementwith the .drive member of said head, and means comprising a yoke-shaped member pivotally supported in connection with the attachment'.v

and rods inoperative engagement with the ends of said yoke-shaped memberfor yieldably supporting the plate and head inconnection with said' attachment.

5. in multiple tappers of the class described, a

tapping attachment having a forward and reverse p driven spindle projecting therefrom with meansv for actuating said spindle in forward and reverse' directions, acoupling plate including a driven member keyedfto the driven spindle of said attachment and having a standard socket portion in connection with whichmemb'ers to be driven are adapted to be coupled, a multiple head for ven attachment to said/coupling plate, said head hav-Y ing a -plurality of driven tool supporting spindles, and means including a drive spindle engaging the socket portion of-said coupling plate for operating said tool-supporting spindles by the forward and reverse drivenspindle of said attachment.

6; 1n multiple tappers of the class described, a tapping attachment having a forward and reverse driven spindle projecting therefrom with means for actuating said spindle in forward and reverse directions, a coupling plate including a driven member keyed to the driven spindle of said attachmentV and having a standard socket portion in connection with which members to be driven are adapted to be coupled, a multiple head for attachment to said coupling plate, said head having a plurality of driven tool supporting spindles, means includinga drive spindle engaging the socket portion of said coupling plate foroperat- A -ings'aid tool supporting spindles by the forward and reverse driven spindle of said attachment, and means for adjustably coupling the multiple head with said plate. f Y

'7. Inmultiple tappers of the class described, a tapping attachment having a forward and reverse drivenV spindle projecting ytherefrom with means for actuating said spindle in forward and kreverse directions, a coupling plate including a driven member keyed to the driven spindle of said attachment and having a standard socket portion in connection with which members to be driven are adapted to Vbe coupled, kva multiple head for attachment to said coupling plate, said head having a plurality of driven tool Vsupporting spindles, means including 'a drive spindleengaging the socket portion of said coupling plate for operating said tool supporting spindles by the forward and reverse driven spindle of said attachment, means foradjustably coupling the multiple head with said plate, and means on vthe head and attachment forguidingthe'movement thereof toward and from a workpiece. y

8. `Inmultiple tappers of the class described, a tapping attachment verse drivenv spindle projecting therefrom with having a forward and re" means for actuating said spindle in forward yand reverse" directions, 'al coupling plate including a driven member keyed to the driven spindle of said attachment and having a standard socket portion inA connection with which members to be driven are adapted to be coupled, a'multiple head for attachment to said coupling plate, saidhead having a plurality of driven tool supporting spindles, means including a drive spindle engaging the socket portion of said coupling plate for operating saidtool supporting spindles by the forward and `reverse driven spindle of said attachment, means 9. A tapping attachment of .the class described comprising a casing, adrive shank projecting from said casing, a driven spindleV projecting from said casing, means within the casing for rotating the driven spindle by said shank in forward and reverse directions, a yoke-shaped supporting member pivoted to one side of the casing and partially encircling the same, means for suspending a tool operating head in connection with said yoke-shaped member and a spring cooperating with said member to yieldably support the head in connection with the casing of said attachment. ll0. The combination with a tapping attachment ofthe class described having a driven member, of a multiple tapping head having a drive member, and means including a coupling plate of standard size for vdetachably coupling tapping heads of varying characteristics with the tapping attachment, and the coupling plate including means rotatable in said plate and to which said driven member and drive member are separately keyed for placing the driven member of the attachment in operative engagement with the drive member of said head. li, The combination with a tapping attachment of the class described having a driven member, of a multiple tapping head having a drive member, andmeans rincluding 'acoupling plate Aof standard size for detachably coupling tapping heads of varying characteristics with the tappingattachment, the coupling plate including means rotatable in said plate and to which said driven member and drive member are separately keyed for placing the driven member of theV at,- tachment in operative engagement with the drive member of said head, and means for adjustaloly coupling the head with said plate.

l2. The combination with a tapping attachment of the class described having a driven member, ci a multiple tapping head having a drive member, and means including a coupling plate of standard size for detachably coupling tapping heads of varying characteristics with the `tapping attachment, the coupling plate including means rotatable in said plate and to which said driven member and drive member are separately keyed for placing the driven member ofthe attachment in operative engagement with the drive member of said head, means for adjustably coupling thel head with said plate, and meansfor yieldably supporting the head and plate in conjunction with said tapping. attachment.

13. ln multiple tool operating devices of the class described, a multiple tool head comprising a drive spindle and a plurality of driven spindles in operative engagement with the drive spindle and with which tools are adapted to be coupled, ya coupling plate of predetermined size for coupling said head with an operating unit, and means in cluding a large socket portion onsaid `head for receiving said plate, and an angular portion on the drivespindle extendinginto said socket portion for coupling said head and spindle with said late. p 14; In multiple tool operating devices of the class described, a multiple tool head comprising a drive spindle and a plurality of driven spindles in operative engagement with the drive spindle and with which tools are adapted to be coupled, a coupling 'plate of predetermined size for coupling said head with an operating unit,

means including a largesocket portion on said head for receiving said plate, an angular portion on the drive spindle Yextending into said socket portion for coupling said'head and spindle with said plate, and guide members coupled and movable with said head for guiding the same in its movement with'respect to a workpiece. l

l5. In multiple tool operating devices of the class described, a multiple tool head comprising a drive spindle and a plurality of driven spindles in operative engagement with the drive spindle and withy which tools are adapted to be coupled, a coupling plate of predetermined size for coupling said head with an operating unit, means including a large socket portion on saidhead for receiving said plate, an angular portion on the drive spindle extending into said socket portion for coupling said head and spindle With said plate, and workpiece guiding and alinement means on said head for alining a workpiece with respect to the axis of the driven spindles of said head.

i6: In-multiple tool operating devices of the class described, meansv including a plate of standardsize for coupling multiple tool heads of varying characteristics with a drive unit, an angular sleeveV socket centrally of the plate, a ball bearingin said plate to provide free rotation of the sleeve socket therein, and said sleeve socket providing acoupling between independent angular spindles'ofv the multiple tool head and driving unit.

17. In multiple tool operating devices of the class described, means including a plate or" standard size for coupling multiple tool heads of varying characteristics with a drive unit, an angular sleeve socket centrally of the plate, a ball bearing in said plate to provide free rotation of the sleeve socket therein, said sleeve socket providing a couplingbetween independent angular spindles of the multiple tool head and driving unit, `and means providing rotary adjustment and coupling of the plate with said head.

18. In multiple tool operating devicesof, the class described, means including a plate of standard size for coupling multiple tool heads of varying lcharacteristics withra drive unit, an angular sleeve socket centrally of the plate, a ball bearing in said plate to provide free rotation of the sleeve socket therein, said sleeve socket providing a coupling betweenindependent angular spindles Yof thermultiple tool head and driving unit, means providing rotary adjustment and coupling of the plate with said head, 'and means for yieldably supportingl the plate in connection with said driving unit.

GEORGE W. ElVlRICK. 

